Internal-combustion engine.



H. MOGORNAGK. NTERNAL GOMBUSTION ENGINE.

APPLICATION I'IvLED AUG. 21, 1906. Ly, Patented Aug. 20, 1912.

l HERBERT McCOB/NACK, .OF WEST CHESTER, PENNSYLVANIA. I

INTERNAL-COMBUSTION ENGINE.

anaasoa Specification of Letters Patent.

Patented Aug. 20, 1912.

Application 1ed:August 21, 1906. Serial No. 331,514.

.To 'all whom 'it may concern:

. Be it-known that l, HERBERT MCCORNAGK,

acitizen of the Unitedv States, residing at West Chester, in the county of Chester and State of Pennsylvania, have invented a new and` useful Improvement in 4Internal-Combustion Engines, of which the following is a specification. i

This invention has reference' to that class of internal combustion engines in which a charge of gaseous fuel is suppliedl to 'the cylinderfo'r every two strokes of the piston and which are usually referred to as twocycle engines, and relates 'more especially to that class of these en ines in which the fuel inlet port of the cylinder is opened during the last ortiony of j the piston, s ortly after the exhaustl port has been opened, Iso that the fuel inlet port and the exhaust port are open at the same tlm. 'i jl l i The objects of the invention are to-pro vide simple and etlicient means for admitting the fuel' tothe cylinder and for scavenging the latter and freeing it as completely .as poss'ble from the spent gases. To that end the fuel admission devices are so constructed that the incoming fresh fuel is distributed around the inner surface of the cylinder in yan annular layer as it enters the cylinder, envelope the spent gases contained `in the cylinder and drives these gases inwardly towardan axial exhaust port.

In the accompanying drawings: Figure 1 is a sectional elevation of an engine em-v bodying my invention. Fig. 2 is -a sectional elevation of the piston, on an enlarged scale. Fign is a horizontal section in line 3-3, Fig. 2. j

Like letters of reference refer to like parts l in the several figures.

A represents the cylinder of an upright engine provided with a spar-ker or igniter a ofany suitable construction and having, if desired, a cooling jacket b.

B represents the piston, C the ycompression chamber upon which the cylinder is mounted, D the crank rotating in' said chamber and E the rod which connects the crank with the piston.

f represents the fuel compression chamber which is arranged the lower side thereo and is uncovered by the piston when the latter is near the end of its return supply port for the in which is arranged, as shown,

ltion with an exhaust the power stroke of terwith the upper these admission v ortion of the cylinder, 'at onethe gas in the chamber being com- "stroke,

by the piston during the power pressed stroke.

g represents the fuel inlet passage of the cylmder arranged at one side thereofand connecting at its lower end with the compression chamber, lwhile `it opens at its upper end inwardly .through the wall of the cylinder. 'f

k represents thercylinder exhaust port l in thelwall of.-

the cylinder above the fuel supply port f V and vopposite the fuel inlet passage g. v

The piston is provided in its'upper porort z' which has its inlet arranged axially in the top' of the piton and which extends downwardly in the piston and then to one side, so that its out-f let registers with the cylinder .exhaust port la when the piston has arrivednear the end of its power stroke.

-c represents the sage `g `ofthe cylinder arrived near the end communication with an annularv distributing chamber O which 1s formed in the piston of the exhaust port this chamber into the cylinder by an annular row of admission passages, nozzles fuelv inlet port of, the y piston w ch has the form of a recess formed Vin the outer side of the piston so as to regisend of the fuel inlet paswhen the piston has of its power stroke.. Y This external inlet port of the piston is in labove the port and` around the inlet end The gas passes from or orifices n. which preferably extend upwardl and outwardly, so as to direct the jets o gas against the inner ysurface of the cylinder. A j

A The piston is' preferably provided above passages with an annular fiange. overhanging' the same and separated from the inner surface of the cylin-L der by a narrow annular space. This delecting flange directs the annular row of streams or jets of gas outwardly and against the inner surface of the cylinder.

The annular gas admission device distributes the incoming fresh fuelcircumferentially around the inner surface of' the cylinder so that the fresh fuel forms an' annular layer which lies closely against that surface and envelops the body of spent v cylinder and the fresh fuel drives the spent I to communicate with ing a fuel inlet port, of a arranged to'discharge adjacent to the periphery of the piston, substantially as set forth.

2. The combination with a cylinder, havfuel distributing chamber to-'communicate with said series of fuel admission passages extending therein adapted from said chamber toward the periphery ofl the piston, and an flange extending toward inder over said passages, forth. l r 1 3. The combination with a cylinder llaving a fuel inlet port and an exhaust port arranged to be uncovered by the piston when it is near the limit of the power stroke, of a piston havingfan exhaust port therein,

annular deflecting the wall of the cylsubstantially as set a fuel distributing chamber arranged in said piston between 35 said exhaust port -and the periphery of the piston, and an annular series of fuel admission passages which extend yfrom the said chambertoward the periphery of the piston, substantially as set forth.

ing a fuel inlety port and an exhaust port arranged to be uncovered by the piston when it is near the limit of the power stroke, of

a piston having an exhaust porttherein, a

fuel distributing chamber in said piston surrounding said exhaust port,'an annular series of'fuel admission passages extending from said chamber vtoward the periphery of ,Y into the -cylinder-chamber at and circumthe piston, and an annular defiecting flange extending toward the periphery of the pisv ton vover said passages, substantially as set forth. v

5. In a two-cycle internal combustion engine, an internally chambered cylinder; a reciprocatory piston .arranged 'within the a fuel-conducting port cumferentially of the piston, and op piston having a port, an annular 4. The combination with a cylinder havferentially of the face of the piston, the forward portion of the said port having a latera y andv outwardly facin side wall which is substantially parallel with the line of movement of the piston, said port being enlarged .at the inner end of thesaid wall inwardly toward the center of the piston and the enlarged portion of the port having a Ylaterally and outwardly facing'side wall 'which slopes laterally outwardly and toward the face of the piston and connects with the rst-mentioned wall; means for supplying fuel to the said port, and means for exhausting the cylinder.

In an internal combustion engine, a piston having a front of hollow character provided with an inner circular ange itting closely in the cylinder and an outer flange vseparated from the said inner flange vby an interval, said outer flange extending circumferentially of the piston and spaced from. the adjacent piston-surrounding portion of the cylinder, said front havlngan openingformed at and centrally of the face of the piston; an. exhaust-port formed in the said front and communicating with the said opening, which exhaust-port registers with an exhaust-passage leading from the cylinder when the piston is at the lower end of its stroke, and inlet passages formed in the cylinder and communicating with the aforesaid interval between the aforesaid ianges'when the piston is at the lower end ofitsstroke. 3

7. In an internal combustion engine, a piston having a front of hollow character provided lwith an inner circular flange fit-, andan outer' ting closely in the cylinderl flange separated from said inner flange by an interval, said outer flange extending circumferentially of the piston and spaced from the adjacent wall or walls of the cylinder, said front having an opening in its top; exhaust-ports below the face of the piston and communicating with the said opening and registering with exhaust-passages leading from the cylinder -when the piston is at the lower end of its-stroke, and inlet passages formed in the cylinder walls an communicating with-,the aforesaid interval between the aforesaid flanges when the piston is at .the lower end of its stroke.

Witness my hand this 14th-day of August, 1906.

HERBERT MCooENAcK. 'i

Witnesses:

ARTHUR P. REID, JANE BARDE EACHUS. 

